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al092011

The sequential numbering of tropical cyclones for a specific forecast basin according to when the first advisory is issued

9.00 to
9.00

9.00

9.00

0.00

distance east or west on the earth's surface from the prime meridian at Greenwich, England of the center of the tropcical cyclone (decimal degrees)

decimal degree

-77.20 to
-32.00

-75.00

-69.30

13.01

the highest 1-minute average wind (at an elevation of 10 meters without an unobstructed exposure) associated with a tropical cyclone at a particular point in time (knots)

35.00 to
87.00

70.00

64.93

17.64

the best estimate of the direction that the center of a tropical cyclone is moving towards (degrees)

22.00 to
9999.00

9999.00

8573.71

3623.01

The name given to each tropical cyclone for which the National Hurricane Center is writing forecast advisories.

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The time in which a forecast or warning is in effect, until it is updated or superseded by a new forecast issuance. The format of the valid time is dd/hhmm.

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The category of the tropical cyclone according to the initial intensity

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the ocean where the tropical cyclone is located

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Timezone

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a rapid fluctuation of wind speed with variations of 10 knots or more between peaks and lulls (knots)

45.00 to
105.00

85.00

79.64

20.98

The date in which an advisory is issued in yymmdd/hhmm format

Text column (no statistics available)

The Saffir-Simpson Hurricane Wind Scale is a 1 to 5 categorization based on the hurricane's intensity at the indicated time. The scale provides examples of the type of damage and impacts in the United States associated with winds of the indicated intensit

0.00 to
2.00

1.00

0.71

0.73

the best estimate of the speed in which the center of a tropical cyclone is moving (knots)

12.00 to
9999.00

9999.00

8572.29

3626.64

Fldatelbl

Text column (no statistics available)

The time interval for which the forecast of a tropical cyclone is provided in graphical format

72.00 to
120.00

120.00

99.43

24.65

number of hours from the forecast valid time for which a forecast is made

0.00 to
120.00

36.00

42.86

36.07

The Development Label represents the category of the tropical cyclone according to the forecast intensity

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Datelbl

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The sequential numbering of forecast advisories for each tropical cyclone

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distance north or south from the equator of the center of the tropical cyclone (decimal degrees)

decimal degree

32.10 to
58.00

38.20

41.25

9.03

The Tropical Cyclone Development Label (TCDVLP) indicates the category of the tropical cyclone according to both the initial and the forecast intensity

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Indicates the type of tropical cyclone: Extratropical or Tropical

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the estimated sea level pressure at the center of a tropical cyclone (the lowest pressure in the system in Millibars)